python: idl: Fix last-id update from a monitor reply. #625

Job	Run time
dpdk gcc	3m 21s
linux deb no dpdk	8m 40s
linux rpm fedora	9m 12s
osx clang --disable-ssl	3m 59s
linux gcc --disable-ssl	4m 16s
linux clang --disable-ssl	3m 23s
linux gcc c99	3m 40s
linux clang c99	3m 22s
linux gcc test	10m 44s
linux clang test asan	22m 13s
linux clang test ubsan	12m 33s
linux gcc test --enable-shared	14m 33s
linux clang test --enable-shared	15m 6s
linux gcc test dpdk	13m 39s
linux clang test dpdk	10m 31s
linux gcc test -ljemalloc	11m 25s
linux clang test -ljemalloc	11m 2s
linux gcc --enable-afxdp	4m 9s
linux clang --enable-afxdp	3m 28s
linux gcc dpdk --enable-shared	5m 6s
linux clang dpdk --enable-shared	4m 57s
linux gcc dpdk-shared	3m 58s
linux clang dpdk-shared	3m 25s
linux gcc dpdk-shared --enable-shared	5m 17s
linux clang dpdk-shared --enable-shared	5m 36s
linux gcc m32 --disable-ssl	4m 3s
	3h 21m 38s

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